We can't say they are trusted if we won't test their apps. New crypto trading apps are just started to gain reputation and trust, thus if they want to earn that then stick to their platform and objectivd as a trusted one with high security. We can test their apps by trading a small amount of money and if they have really good services, then we can determined it. But if you have doubt in new crypto trading apps, just prefer the old ones like Binance, etc.